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Trichobothrial Pattern.
Patella with two ventral trichobothria along ventroexternal carina (the third ventral trichobothrium is positioned on the external face). Chela with a row of 15-16 trichobothria extending from base of external face to underside of chela manus (this row includes Db, Eb
1
-Eb
3
, V
1-4
, and 7-8 accessory trichobothria).
Chelal trichobothrium
ib
positioned at the base of the fixed finger. Chela finger trichobothrium
est
about equidistant between
et
and
esb
.

Legs
. – Basitarsi and telotarsi with setal combs. Telotarsi ventrally with a median row of small spinules that are flanked distally by one pair of slightly larger spinules. Ventromedian spinule row flanked laterally by setae.

- Williams (1980) created this monotypic genus for
P. pumilis
, a psammophilous burrower endemic to the Magdalena Plain and southern Sierra Giganta regions of Baja California Sur,
México.
He placed the genus within the subfamily Vaejovinae of the Vaejovidae. Haradon (1984) suggested that
Paravaejovis
may be related to members of the
Paruroctonus
borregoensis
group, e.g.
P. pseudopumilis
.

Original Description:

Williams (1980):

"Description of Genus. - Carapace frontal margin convex; three lateral ocelli at each anterolateral corner of carapace; metasoma with ventromedian keels paired on segments I-IV; genital operculum completely divided in male, fused in female, males with one pair genital papillae; pectine with anterior lamellae, subcircular middle lamellae, subtriangular fulcra; chelicera similar to
Vaejovis
in structure, completely lacking denticles on ventral margin of movable finger; pedipalp fingers with primary denticles arranged in single row, this more or less subdivided into 4 or 5 subrows by slightly enlarged denticles, primary row of denticles flanked on prolateral side by 5 supernumerary granules on fixed finger, by 7 supernumerary granules on movable finger; pedipalp chela with 34 total trichobothria; ventral surface of pedipalp palm with conspicuous curved row of 15 trichobothria originating near movable-finger base and terminating on proximal retrolateral aspect of palm; pedipalp brachium with two trichobothria on ventral surface.
Diagnosis. - Similar to
Vaejovis
and
Paruroctonus
but differs as follows: 34 trichobothria on the pedipalp chela (not 26-28); with conspicuous curved row of 15 trichobothria on ventral aspect of palm from movable-finger base to posterior retrolateral aspect of palm (this row trichobothria more or less degenerate in
Vaejovis
and
Paruroctonus
, not composed of more than 9 trichobothria).
"

Literature Cited:

Haradon, R.M. 1984. New and redefined species belonging to the
Paruroctonus
baergi
group (Scorpiones, Vaejovidae).
Journal of Arachnology
12
: 205–221.

Stockwell, S. A. 1992. Systematic observations on North American Scorpionida with a key and checklist of the families and genera. Journal of Medical Entomology, 29(3): 407-422.